Are there xxxhdpi density devices?
Android devices screen density increases (see https://github.com/paulvi/displayclasses) and there are already devices with density higher than xxhdpi (extra-extra-high) ~480dpi
like Samsung Galaxy S6 577 2560 1440
(But I cannot check if it is really xxxhdpi)
Is it time to prepare 192x192 icons?
(4x times 48x48 dp, see http://developer.android.com/design/style/iconography.html )
See also Android Official Icons for XXHDPI and XXXHDPI
UPDATE: Was asked a year before as Android xxx-hdpi real devices
Also Nexus 6 and Nexus 9 Screen density
Android categorizes mobile screen density into one of six families: LDPI (low): ~120dpi. MDPI (medium): ~160dpi. HDPI (high): ~240dpi.
The configuration qualifiers you can use for density-specific resources are ldpi (low), mdpi (medium), hdpi (high), and xhdpi (extra high).
You can get info on the display from the DisplayMetrics struct: DisplayMetrics metrics = getResources(). getDisplayMetrics(); Though Android doesn't use a direct pixel mapping, it uses a handful of quantized Density Independent Pixel values then scales to the actual screen size.
Just for reference purpose, now Google maintain a list of devices density and other information at https://design.google.com/devices/ which is mainly targeted for material design guideline.
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